For use only by students authorized by Services for Students with Disabilities for alternate format textbooks.
Did you check to see if the book is already available in an alternate format at websites such as www.learningally.org, www.bookshare.org, www.worldcat.org, and www.gutenberg.org?
Did you try to "look inside" the book at a bookstore or at websites such as Amazon or Google Books to make sure you need the book in an alternate format?